Consistent use of const for LookupResult.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index cd152a26b46175090026d30bcce0458b77165c79..710d2ba744554b9a4af2351ca1499082d1b6d893 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -2284,12 +2284,12 @@ class JSObject: public JSReceiver {
 
   // Retrieve a value in a normalized object given a lookup result.
   // Handles the special representation of JS global objects.
-  Object* GetNormalizedProperty(LookupResult* result);
+  Object* GetNormalizedProperty(const LookupResult* result);
 
   // Sets the property value in a normalized object given a lookup result.
   // Handles the special representation of JS global objects.
   static void SetNormalizedProperty(Handle<JSObject> object,
-                                    LookupResult* result,
+                                    const LookupResult* result,
                                     Handle<Object> value);
 
   // Sets the property value in a normalized object given (key, value, details).